parameters. What I dont think you are seeing is the effect of the runner length and plenum chamber volume have on the volumetric efficiency of the engine across its operating range of RPM. Your basic criteria assume 100% VE to keep comparisons 1:1. Runner length and plenum chamber volume operate in a transient mode relative to engine RPM. Look up hemholtz resonance and intake manifold design. Its a bit lengthy to explain. :-P
Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
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